/**
 * Copyright (C) 2009 aileron.cc
 * 
 * Licensed under the Apache License, Version 2.0 (the "License"); you may not
 * use this file except in compliance with the License. You may obtain a copy of
 * the License at
 * 
 * http://www.apache.org/licenses/LICENSE-2.0
 * 
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
 * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
 * License for the specific language governing permissions and limitations under
 * the License.
 */
package cc.aileron.orm.sql.template;

import java.util.HashMap;

import cc.aileron.template.parser.ParserMethodNotFoundException;
import cc.aileron.template.parser.ParserMethodProvider;
import cc.aileron.template.parser.ParserMethodProviderMap;
import cc.aileron.template.parser.method.PlainTextParserProvider;

import com.google.inject.Inject;
import com.google.inject.Injector;
import com.google.inject.Singleton;

/**
 * 
 * xml-method-map
 * 
 * @author Aileron
 * 
 */
@Singleton
public class SqlParserMethodProviderMap implements ParserMethodProviderMap
{
    public ParserMethodProvider get(final String methodName) throws ParserMethodNotFoundException
    {
        final Class<? extends ParserMethodProvider> targetClass = map.get(methodName);
        if (targetClass == null)
        {
            throw new ParserMethodNotFoundException(methodName);
        }
        return injector.getInstance(targetClass);
    }

    /**
     * @param injector
     */
    @Inject
    public SqlParserMethodProviderMap(final Injector injector)
    {
        this.injector = injector;
    }

    /**
     * injector
     */
    private final Injector injector;

    /**
     * method-classes
     */
    private final HashMap<String, Class<? extends ParserMethodProvider>> map = new HashMap<String, Class<? extends ParserMethodProvider>>();
    {
        map.put("plainText", PlainTextParserProvider.class);
        map.put("var", SqlVarMethodParserProvider.class);
    }
}